gibson



Feb. 21, 1956 s. w. GIBSON 2,735,239

LINING ROUGHING MACHINES Filed May 5, 1953 .3 Sheets-$heet 1 Inventor George W Gibson Feb. 21, 1956 e. w. GIBSON 2,735,239

LINING ROUGHING MACHINES Filed May 5, 1953 3 Sheets-Sheet 2 Inventor George W Gibson b hi Attorney Feb. 21, 1956 w GIBSON 2,735,239

LINING ROUGHING MACHINES Filed May 5, 1953 3 Sheets-Sheet 3 B his ney United States Patent LINING ROUGHmG MACHINES George William Gibson, Leicester, England, assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application May 5, 1953, Serial No. 353,169 Claims priority, application Great Britain May 28, 1952 6 Claims. (Cl. 51-128) This invention relates to abrading machines and more particularly to machines for roughing the margins of thin and limp pieces of leather such as are used for shoe linings.

In the manufacture of a cement lasted shoe the overlasted margin of the lining is attached to the insole by cement and it is desirable to roughen the marginal portion of said lining so as to insure a strong bond when it is cemented to the insole. In this and other operations in the manufacture of shoes it is desirable to remove the glazed surface finish of the lining leather and roughen the leather so that a strong cement bond may be made. Also, in most cases, it is necessary or desirable that the rough ing operation be performed before the lining is assembled with the upper and when it is in a limp and flaccid condition.

It is, therefore, an object of this invention to provide a simple and eflicient machine for roughing the marginal portions of limp or flexible workpieces either flatly or at an angle.

According to various features of this invention an abrading disk is provided which is mounted for rotational movement in a fixed position. A slotted guard is mounted above the disk so that limited access to the radial abrading surface of the disk is permitted. Apresser foot is provided to yieldingly hold a workpiece against the abrading disk as successive portions of the workpiece are manually presented to the exposed surface of said disk. Also, means are provided for varying the angular relationship of the bottom of the presser foot to the abrading disk whereby it is possible to rough the marginal portion of the workpiece either flatly or at an angle.

The above and other features of the invention, including various novel details of construction and combinations of parts, will now be more particularly described with reference to the accompanying drawings and pointed out in the claims.

In the drawings,

Fig. 1 is a view in front elevation of a machine embodying this invention;

Fig. 2 is a plan view of the machine with certain parts broken away for clarity;

Fig. 3 is a view in right-hand elevation of the machine with certain parts broken way for clarity; and

Fig. 4 is a view on an enlarged scale of certain operative elements of the machine.

Referring to Figs. 1, 2 and 3, the machine is shown mounted upon a wooden table T according to the conventional manner employed with so-called bench machines of this type. The machine has a main frame upon which the operative elements are mounted. An abrading disk 52 is mounted at the upper end of a constantly rotating vertical shaft 16 with its radial face accessible through a slot 70 in a movable guard 64. A presser foot 72 is pivotally mouted in relation to the main frame 10 and is disposed above the abrading disk 52 at the point where access is permitted by the slot 70. There is provided an adjustable weight 96 on the member on which the pressure foot 72 is mounted for varying, the pressure applied by said presser foot 72 and also means are provided for varying the angular relationship of the presser foot 72 to the abrading disk 52. With this arrange ment it is possible to roughen the marginal edge of loose linings by manually passing them beneath the presser foot in the manner shown in Fig. 2'.

More particularly, and in accordance with the features of this invention, the main frame 10 of the machine is bolted to a wooden table T by four bolts 12. An abrading head, indicated generally by the reference character 14, is secured to the upper end of a vertical shaft 16 by aset screw 18. The shaft 16 is rotatably mounted in projections 20, 22 extending from the main frame 10. Axial movement of. the shaft 16 is prevented by the lower surface of the abrading head 14'which abuts the upper surface of the projection 20 and by a washer 24 which is maintained in contact with the lower surface of the projection 22 by a nut 26 threaded upon the shaft 16. For imparting rotational movement to the shaft 16 a pulley 28 is secured thereto by a set screw 30 around which pulley passes an endless belt 32. A bracket 34 extends to the left as seen in Fig. 1 from the main frame 10 upon which pulleys 36, 38 are rotatably mounted by shoulder screws 40, 42 threaded into the bracket 34. The belt 32 passes around the pulleys 36, 38 and downwardly through holes 44, 46 (Fig. 2) in the table T to a conventional, constantly rotating power source not shown. The abrading head 14 comprises an abrading disk support $8 on top of which is mounted a layer of resilient material 50 and the abrading disk 52 which is held against the layer of resilient material 50 by a shallow-headed screw 54 which in turn is threaded into the abrading disk support 48'.

A fixed guard 56 is provided to protect the peripheral surface of the abrading head 14 it being attached by screws 58 to the vertical portion of a bracket 60 which is secured to the main frame 10 by screws 62. A. movable guard 64 is provided to protect the radial face of the abrading disk 52. The guard 64 is movable in that itmay be pivoted upon a screw 66 which passes through the horizontal section of the bracket 60 and is secured thereto by a wing nut 68 in such a manner that the guard may be swung aside to permit the abrading disk to be replaced when worn. A slot 70 is provided in the movable guard 64 to permit limited access to the abrading disk 52.

Located above the abrading disk 52 and within the area of the slot 70 is a presser foot 72 w ich is mounted upon a mounting block 74. The block in turn is secured to two rearwardly extending members 76, 78 which are secured to a short shaft 80. The shaft 80 in turn is pivotally suspended on twopivot screws 82. which are threaded into vertical posts 84, 86 extending upwardly from the main frame 10 and secured thereto by set screws 88. Check nuts 90 are provided to lock the pivot screws 82in proper relationship. The weight distribution of the presser foot assembly is such that normally counterclockwise rotation about the pivot screws 82 as seen in Fig. 3 is urged. A stop screw 92 threaded into the main frame 10 and arranged in the'path of the mounting block 74 is provided to limit this rotational movement and is adjusted to provide the desired space relationship between the rounded bottom surface 94 of the presser foot 72 and the abrading disk 52. A weight 96 is secured by a wing nut 98 to the member 78 and is adjusted toand away from the pivot screws 82 in order to vary the pressure which the presser foot 72 will exert. upon" the work. Means are provided for varying the angular relationship of the lower surface 94 of the presser foot 72 to the abrading disk 52, which will now be explained and which can best be seen in Fig. 4. The presser foot 72 is mounted by screws 100 on a flat plate 102. The flat plate 102 is held in slidable relationship to the mounting block 74 by shoulder screws 104, 106 which pass through a slot 108 in the mounting block 74 and through holes in the fiat plate 102 being secured thereto by nuts 110,112, respectively. An adjusting screw 114 is threadedinto the mounting block 74 and bears against the shoulder section of the screw 104. A compression spring 116 bears against the shoulder section of the screw 106, being held in this position by a grub screw 118 which is also threaded into the mounting block 74. The slot 108 is constructed on radii which extend substantially from the upper peripheral edge of the abrading disk 52. T herefore, by adjusting the screw 114 the angular relationship of the lower surface 94 to the abrading disk 52 may be varied about. the peripheral edge of said disk.

An edge gage 120 which issecured to the main frame 10 by screws 122 is provided to assist an operator in feeding a workpiece beneath the presser foot 72. As an optional feature, a secondary work guide 124 may be provided to further assist the operator in guiding the workpiece.

A table 126, which is provided for storing workpieces to be processed, is secured to the bracket 60 and to the vertical posts 84, 86 by three screws 128.

The operation of this machine is simple. The adjusting screw 114 is regulated to provide the proper angular relationship of the bottom surface 94 of the presser foot 72 to the abrading disk 52. The stop screw 92 is adjusted to provide the proper clearance between the presser foot 72 and the abrading disk 52. The weight 96' is adjusted so as to provide the desired pressure upon the workpiece W as it passes beneath the presser foot 72. A workpiece W is then inserted by an operator beneath the presser foot 72 as shown in Fig. 2. It will be noted that the direction of rotation of the abrading disk '52 is the same as the direction of feed of the workpiece. This feature enables an operator to carefully control the rate of feed of the workpiece and thereby obtain uniform results.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A machine for abrading the marginal portion of a piece of flexible sheet material having, in combination, an abrading disk mounted for rotational movement in a fixed position and having its upper abrasive face substantially in a horizontal plane, a guard located above the abrading disk having a slot therein to permit access to said disk said guard having a work supporting surface adjacent said slot, and yieldable means arranged to maintain the marginal in contact with the abrading disk where access is permitted by said slot as successive portions of said marginal portion are progressively presented to the abrading disk. 2. A machine for abrading the marginal portion of a piece of flexible sheet material having, in combination,

an abrading disk mounted for rotational movement in a fixed position and having its upper radial abrasive face substantially in a horizontal plane, a guard located above said disk and having a slot therein to permit access to said disk said guard having a work supporting surface adjacent said slot, guide means for locating the edge of a piece of sheet material as it is presented to the abrading .disk,.and yieldable means arranged to maintain the marginal portion of a piece of sheet material in contact with the abrading disk where access is permitted by said slot as successive portions of said marginal portion are progressively presented to the abrading disk.

3. A machine for abrading the marginal portion of a piece of flexible sheet material having, an abrading disk mounted for rotational movement in a portion of a mem of sheet material in combination,

fixed position and having its upper radial abrasive face substantially'in a horizontal plane, a guard located above said disk having a slot therein to permit access to said disk said guard having a work supporting surface adjacent said slot, and yieldable means arranged to maintain the marginal portion of a piece of sheet material in contact with the abrading disk where access is permitted by said slot as successive portions of said marginal portion are progressively presented to the abrading disk comprising a presser foot having a rounded lower surface for facilitating the insertion of a workpiece.

4. A machine for abrading the marginal portion of a piece of flexible sheet material having, in combination, an abrading disk mounted for rotationalmovement in a fixed position and having its upper radial abrasive face substantially in a horizontal plane, a guard located above said disk having a slot therein to permit access to said disk said guard having a work supporting surface adjacent said slot, and yieldable means arranged to maintain the marginal portion of a piece of sheet material in contact with the abrading disk where access is permitted by said slot as successive portions of said marginal portion are progressively presented to the abrading disk, said means comprising a presser foot pivotally mounted upon the machine for movement toward theabrading disk.

5. A machine for abrading the marginal portion of a piece of flexible sheet material having, in combination, an abrading disk mounted for rotational movementin a fixed position and having its upper radial abrasive face substantially in a horizontal plane, a guard located above said disk and having a slot therein to permit access to said disk said guard having a work supporting surface adjacent said slot, yieldable means arranged to maintain the marginal portion of a piece of sheet material in contact with the abrading disk where access is permitted by said slot, said means comprising a presser foot pivotally mounted upon the machine for movement towardthe abrading disk, and means for adjusting the angular relationship of the bottom of said presser foot to the abrading disk. 7 1

6. A machine for abrading the marginal portionof a piece of flexible sheet material having, in combination, an abrading disk mounted for rotational movement in a fixed position and having its upper radial abrasive face substantially in a horizontal plane, a guard located above said disk and having a slot therein to permit access to said disk, said guard having a work supporting surface adjacent said slot, guide means for locating the edge of a piece of sheet material as it is presented to the abrading disk, yieldable means'arranged to maintain the marginal portion of a piece of sheet material in'contact with the abrading disk where access is permitted by said slot, said means comprising a presser foot pivotally mounted upon the machine for movement toward the abrading disk, and means for angularly adjusting the bottornvof said presser foot in relation to the abrading disk about a ,point on the upper peripheral edge of said disk.

References Cited in the file of this patent UNITED STATES PATENTS 557,825 Johnston Apr. 7, 1896 779,646 Gorton Jan;-10,- 1905 823,578 Bayley June-19, 1906 902,910 Reinhardt Nov. 3, 1908 1,168,645 Dyer May 11,1915 2,128,768 Dyer Aug. 30,4938 2,248,953 Bunch July 15, 1941 Krueger Aug. 4,-1942 

